直到昨天我才能够在我的 Ubuntu 计算机上工作,并使用 root 用户连接到 Mysql。今天我拥有的每个应用程序都无法连接到 mysql。我没有更改它的配置或 root 用户的 psw。
我做了很多尝试。他们在这里:
mysql -uroot -p
mysql -uroot -p --host=127.0.0.1
他们都给了我这个:
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
然后,我尝试启动以下命令(它们与我给出的顺序不符...正如您将看到的,我偶然发现了一些“无法锁定./ibdata1”甚至“带有/的分区”的错误var/lib/mysql 太满了!'...杀死挂起的进程并重新启动解决了这些问题,但我仍然无法使用 root 连接到 mysql):
$ ps -aux | grep mysql
mysql 3249 0.0 1.2 550092 48580 ? Ssl 14:21 0:00 /usr/sbin/mysqld
mattia 3616 0.0 0.0 15968 940 pts/11 S+ 14:33 0:00 grep --color=auto mysql
$ mysql --no-defaults --force --user=root --host=127.0.0.1 --database=mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
$ mysqld --skip-grant-tables
150331 14:32:31 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
150331 14:32:31 [Warning] Can't create test file /var/lib/mysql/Mattia-PC-Linux.lower-test
150331 14:32:31 [Warning] Can't create test file /var/lib/mysql/Mattia-PC-Linux.lower-test
mysqld: Can't change dir to '/var/lib/mysql/' (Errcode: 13)
150331 14:32:31 [ERROR] Aborting
150331 14:32:31 [Note] mysqld: Shutdown complete
sudo /etc/init.d/mysql stop
sudo service mysql stop
sudo service mysql start
sudo /etc/init.d/mysql start
$ tail -n1000 /var/log/mysql/error.log
InnoDB: Unable to lock ./ibdata1, error: 11
InnoDB: Check that you do not already have another mysqld process
InnoDB: using the same InnoDB data or log files.
InnoDB: Unable to lock ./ibdata1, error: 11
InnoDB: Check that you do not already have another mysqld process
InnoDB: using the same InnoDB data or log files.
150331 14:19:11 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead.
150331 14:19:11 [Note] Plugin 'FEDERATED' is disabled.
150331 14:19:11 InnoDB: The InnoDB memory heap is disabled
150331 14:19:11 InnoDB: Mutexes and rw_locks use GCC atomic builtins
150331 14:19:11 InnoDB: Compressed tables use zlib 1.2.8
150331 14:19:11 InnoDB: Using Linux native AIO
150331 14:19:11 InnoDB: Initializing buffer pool, size = 128.0M
150331 14:19:11 InnoDB: Completed initialization of buffer pool
150331 14:19:11 InnoDB: highest supported file format is Barracuda.
150331 14:19:18 InnoDB: Waiting for the background threads to start
150331 14:19:19 InnoDB: 5.5.41 started; log sequence number 1515015658
150331 14:19:19 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306
150331 14:19:19 [Note] - '127.0.0.1' resolves to '127.0.0.1';
150331 14:19:19 [Note] Server socket created on IP: '127.0.0.1'.
150331 14:19:20 [Note] Event Scheduler: Loaded 0 events
150331 14:19:20 [Note] /usr/sbin/mysqld: ready for connections.
Version: '5.5.41-0ubuntu0.14.04.1' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu)
150331 14:21:44 [Note] /usr/sbin/mysqld: Normal shutdown
150331 14:21:44 [Note] Event Scheduler: Purging the queue. 0 events
150331 14:21:44 InnoDB: Starting shutdown...
150331 14:21:45 InnoDB: Shutdown completed; log sequence number 1515015658
150331 14:21:45 [Note] /usr/sbin/mysqld: Shutdown complete
150331 14:21:48 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead.
150331 14:21:48 [Note] Plugin 'FEDERATED' is disabled.
150331 14:21:48 InnoDB: The InnoDB memory heap is disabled
150331 14:21:48 InnoDB: Mutexes and rw_locks use GCC atomic builtins
150331 14:21:48 InnoDB: Compressed tables use zlib 1.2.8
150331 14:21:48 InnoDB: Using Linux native AIO
150331 14:21:48 InnoDB: Initializing buffer pool, size = 128.0M
150331 14:21:48 InnoDB: Completed initialization of buffer pool
150331 14:21:48 InnoDB: highest supported file format is Barracuda.
150331 14:21:48 InnoDB: Waiting for the background threads to start
150331 14:21:49 InnoDB: 5.5.41 started; log sequence number 1515015658
150331 14:21:49 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306
150331 14:21:49 [Note] - '127.0.0.1' resolves to '127.0.0.1';
150331 14:21:49 [Note] Server socket created on IP: '127.0.0.1'.
150331 14:21:49 [Note] Event Scheduler: Loaded 0 events
150331 14:21:49 [Note] /usr/sbin/mysqld: ready for connections.
Version: '5.5.41-0ubuntu0.14.04.1' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu)
这是/etc/mysql/my.cnf:
#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
# Here is entries for some specific programs
# The following values assume you have at least 32M ram
# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
#
# * Basic Settings
#
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1
#
# * Fine Tuning
#
key_buffer = 16M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 8
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover = BACKUP
#max_connections = 100
#table_cache = 64
#thread_concurrency = 10
#
# * Query Cache Configuration
#
query_cache_limit = 1M
query_cache_size = 16M
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file = /var/log/mysql/mysql.log
#general_log = 1
#
# Error log - should be very few entries.
#
log_error = /var/log/mysql/error.log
#
# Here you can see queries with especially long duration
#log_slow_queries = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
# other settings you may need to change.
#server-id = 1
#log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 100M
#binlog_do_db = include_database_name
#binlog_ignore_db = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
[mysql]
#no-auto-rehash # faster start of mysql but no tab completition
[isamchk]
key_buffer = 16M
#
# * IMPORTANT: Additional settings that can override those from this file!
# The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/
有什么想法吗?
我终于能够通过这种方式解决问题了:
kill mysql.pid process
sudo /usr/bin/mysqld_safe --skip-grant-tables &
从现在开始我可以进入mysql控制台了,我发现root用户不存在了! 我必须创造它